550959551 has 2 divisors, whose sum is σ = 550959552. Its totient is φ = 550959550.

The previous prime is 550959547. The next prime is 550959569. The reversal of 550959551 is 155959055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550959551 - 2² = 550959547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550959581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275479775 + 275479776.

It is an arithmetic number, because the mean of its divisors is an integer number (275479776).

Almost surely, 2^550959551 is an apocalyptic number.

550959551 is a deficient number, since it is larger than the sum of its proper divisors (1).

550959551 is an equidigital number, since it uses as much as digits as its factorization.

550959551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 253125, while the sum is 44.

The square root of 550959551 is about 23472.5275801308. The cubic root of 550959551 is about 819.7974668352.

It can be divided in two parts, 55095 and 9551, that added together give a palindrome (64646).

The spelling of 550959551 in words is "five hundred fifty million, nine hundred fifty-nine thousand, five hundred fifty-one".